What vehicle gets the worst gas mileage? A Ford F-350? A Dodge Grand Caravan in a headwind? Anything your teenage kid is driving? The answer is…the NASA Crawler. This is the vehicle that was (and still is) used to transport spacecraft from NASA’s Vehicle Assembly Building to the launch pad (including Apollo, Skylab and the Space Shuttles). It weighs 6 million pounds, requires 30 people to run and uses 150 gallons of diesel fuel per mile.